diff --git a/src/output/plugins/httpd/IcyMetaDataServer.cxx b/src/output/plugins/httpd/IcyMetaDataServer.cxx
index 8bc0cbd24..0314089f1 100644
--- a/src/output/plugins/httpd/IcyMetaDataServer.cxx
+++ b/src/output/plugins/httpd/IcyMetaDataServer.cxx
@@ -12,7 +12,7 @@
 std::string
 icy_server_metadata_header(const char *name,
 			   const char *genre, const char *url,
-			   const char *content_type, int metaint) noexcept
+			   const char *content_type, std::size_t metaint) noexcept
 {
 	return fmt::format("HTTP/1.1 200 OK\r\n"
 			   "icy-notice1:<BR>This stream requires an audio player!<BR>\r\n" /* TODO */
diff --git a/src/output/plugins/httpd/IcyMetaDataServer.hxx b/src/output/plugins/httpd/IcyMetaDataServer.hxx
index 26f6a06d8..85bae58e5 100644
--- a/src/output/plugins/httpd/IcyMetaDataServer.hxx
+++ b/src/output/plugins/httpd/IcyMetaDataServer.hxx
@@ -1,11 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 // Copyright The Music Player Daemon Project
 
-#ifndef MPD_ICY_META_DATA_SERVER_HXX
-#define MPD_ICY_META_DATA_SERVER_HXX
+#pragma once
 
 #include "Page.hxx"
 
+#include <cstddef>
 #include <cstdint>
 #include <string>
 
@@ -15,9 +15,7 @@ struct Tag;
 std::string
 icy_server_metadata_header(const char *name,
 			   const char *genre, const char *url,
-			   const char *content_type, int metaint) noexcept;
+			   const char *content_type, std::size_t metaint) noexcept;
 
 PagePtr
 icy_server_metadata_page(const Tag &tag, const TagType *types) noexcept;
-
-#endif